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Inside the comet 67P/Churyumov — Gerasimenko there are no large voids. The mission of “Rosetta” the European space Agency made measurements that clearly demonstrated and solved the old mystery. Comets are icy debris left over from the formation of the planets 4.6 billion years ago. Spacecraft have visited a total of eight comets, and through these missions we pulled a picture of the basic properties of these space-time capsules. On some questions the answers were found, others appeared.
Comets, as we know, consist of a mixture of ice and dust, and if there were compact, gravity superior to water. However, previous measurements have shown that some of them have very low density, much lower than water ice. Low density means that the comet must be extremely porous.
But what is this porosity: due to large voids in the subsurface of the comet, or due to a more homogeneous structure with low density? Continue reading
Astronomers have discovered the 9th planet of the Solar system?
Giant in the Kuiper belt
Perhaps, the ideas of humans about the Solar system far from reality. Scientists from the University of California, Michael brown and Konstantin Batygin has published a paper in which it is proved that in the Solar system there is at least one full planet .
For the first time sensational work of scientists was published in The Astronomical Journal, later it was reported by reputable scientific journals Science and Nature.
As stated in the work, a new planet, still do not have own names, was found by mathematical analysis of perturbations that experience the body the so-called “Kuiper belt” — space on the outskirts of the Solar system.
According to the calculations of brown and batygina, the ninth planet orbit is at a distance of 20 orbits from Neptune. Revolution around the Sun, this object travels in 10 – 20 thousand years. Planet, according to the findings of researchers exceeds the Land mass 10 times. Continue reading
Space exploration mankind is just beginning. It’s only been 47 years since the launch of the first artificial satellite. At the dawn of the space seemed to fly on the next planet there are very few. The great powers of the world tacitly competed for the right to be the pioneers of space. As you know, the palm in this area belonged to the Soviet Union first launched into space man.
After the launch of Yuri Gagarin the world community recognized the absolute leadership of the USSR. But the main competitor – the United States of America – was not shared by the tumultuous enthusiasm about another giant leap of progress. And if the Soviet Union existed, the phrase “Catch up and overtake America!”, before members of the NASA task was to restore the eroded national prestige ahead of the Soviet Union in the space race. Three weeks after the flight of the first American astronaut in space, John F. Kennedy vowed America, after ten years since the Americans landed on the moon.
Indeed, on July 21, 1969 American astronaut first stepped on the moon. For Americans, this event was no less significant than the discovery of America or the Declaration of independence. Around the globe spread the pictures depicting the first inhabitants of the moon under the stars and stripes, and later shots of the film depicting a historic moment. With them and began don’t setaside this time the dispute about the lunar program. Continue reading